Меню сайта
Поиск
Вход на сайт

Календарь
«  Июнь 2024  »
ПнВтСрЧтПтСбВс
     12
3456789
10111213141516
17181920212223
24252627282930
Статистика

Всего на сайте: 1
Гостей: 1
Пользователей: 0
Flag Counter
WEB Cluster
Установите Flash player для полного просмотра сайта!
Солнце
Визит на сайт
Наш баннер
BannerFans.com
Друзья сайта
Personal site of the amateur radio operator UR3LTD Сервер радиолюбителей России - схемы, документация,
 соревнования, дипломы, программы, форумы и многое другое! Web site UR7QM
Архив записей

Главная » 2024 » Июнь » 5 » Details matter
08:10
Details matter
Details matter.
I reminded myself of this yet again when I discovered that my antenna switch and UHF connectors were dramatically reducing UHF signal strength and power output.
Thinking today about how to get more signal to/from a distant repeater, I considered multiple antenna options. Then, because it's a 70cm repeater, I thought about my connectors.
I'm using a Diamond DMN-X300NA 2m/70cm vertical with Type N connectors. I knew that UHF connectors introduced more loss at UHF frequencies (why then are they called UHF connectors???), so I bought both quality coax and good connectors to bring this into the house.
Bringing the coax into the house, it passes first through my outside-the-shack lightning protection system. I use a Type N connector arrester, but adapt to a UHF-UHF jumper going to the radio.
A couple of years ago, I added a switch allowing me to easily disconnect the antenna to reduce the risk of EMP/solar flare damage. I put a dummy load on the switch to reduce the risk of dummies (that would mainly be me, some days) keying the transmitter without an antenna (is that why they are called dummy loads?? :)))
So, for a test today, I removed the switch and second UHF/UHF jumper from the line and BOOM: three s-units signal improvement from the distant repeater.
First result of test: not thinking about the Yagi anymore.
Second result of test: reminding self that details matter.
Third result of test: thinking I'm going to tell you about this in case my story is helpful
Просмотров: 20 | Добавил: Admin1958 | Теги: Details matter | Рейтинг: 4.0/1
Всего комментариев: 0
avatar

Copyright MyCorp © 2024